Hello all! I have been visiting this site for awhile just to read about various pocket watches and now I am stuck on this one. I come across very few Omega watches, so I am unfamiliar with movement identification. The serial number is 4,559,134 so about 1914. When I looked at the Ranfft.de website, the movement seems to be a 19"'? I know there are different grades ranging from A-D and CCR-DDR but I can't find anywhere to reference these grades. Because of the collets, I am thinking it is at least a C grade. It is an open face watch with sub-seconds at the 6, 14K gold case, and has a star regulator. Please, please, please any help/advice would be appreciated.